diff --git a/sofort/client.py b/sofort/client.py
index 4b24c85..86e888c 100644
--- a/sofort/client.py
+++ b/sofort/client.py
@@ -7,7 +7,7 @@
 from sofort.internals import Config, as_list
 from sofort import model
 
-from _version import __version__
+from sofort._version import __version__
 
 API_URL = 'https://api.sofort.com/api/xml'
 TRANSACTION_ID = '-TRANSACTION-'
diff --git a/sofort/model.py b/sofort/model.py
index d538d85..bf31f8c 100644
--- a/sofort/model.py
+++ b/sofort/model.py
@@ -14,7 +14,7 @@
 def response(xmlstr):
     result = xmltodict.parse(xmlstr)
     # only one root element is allowed in XML
-    for root, value in result.iteritems():
+    for root, value in result.items():
         if value is None:
             return None
         factory = factories[root]
diff --git a/sofort/xml.py b/sofort/xml.py
index ff76d70..a78c859 100644
--- a/sofort/xml.py
+++ b/sofort/xml.py
@@ -59,7 +59,7 @@ def multipay(config):
 def transaction_request_by_params(params):
     root = etree.Element('transaction_request')
     root.set('version', '2')
-    for name, value in params.iteritems():
+    for name, value in params.items():
         if name == 'transaction':
             for transaction_id in value:
                 etree.SubElement(root, 'transaction').text = transaction_id